Positive electrode of secondary battery, and secondary battery using same

a secondary battery and positive electrode technology, applied in the direction of positive electrodes, active material electrodes, cell components, etc., can solve the problems of significant deterioration in capacity, insufficient low temperature output characteristics, and insufficient etc., to achieve excellent high temperature cycle characteristics, excellent low temperature output characteristics, and excellent durability
US20200388835A1Active Publication Date: 2020-12-10TOYOTA JIDOSHA KK +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Publication Date
2020-12-10

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Abstract

A positive electrode imparts secondary battery with low temperature output characteristics, high temperature cycle characteristics and durability against high voltage. A positive electrode of secondary battery includes positive electrode current collector and positive electrode active substance layer on positive electrode current collector. The positive electrode active substance layer contains positive electrode active substance particles and oxide particles which are dispersed in positive electrode active substance layer as separate particles from positive electrode active substance particles. The positive electrode active substance particles each include coating of titanium-containing compound at the surface. The titanium-containing compound in coating is at least one compound selected from group consisting of TiO2, TinO2n−1, wherein n is integer of 3 or more, and oxides containing Li and Ti. The oxide particles include at least one oxide selected from group consisting of TiO2, TimO2m−1, wherein m is integer of 3 or more, and oxides containing Li and Ti.
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Description

BACKGROUND OF THE INVENTION1. Field of the Invention

[0001] The present disclosure relates to a positive electrode of a secondary battery. The present disclosure also relates to a secondary battery using the positive electrode. It should be noted that this application claims priority on the basis of Japanese Patent Application No. 2019-106060, which was filed on Jun. 6, 2019, and the entire contents of that application are incorporated by reference in this specification.2. Description of the Related Art

[0002] In recent years, secondary batteries such as lithium secondary batteries have been advantageously used as portable power sources for personal computers, handheld devices, and the like, and as motive power sources for vehicles such as electric vehicles (EV), hybrid vehicles (HV) and plug-in hybrid vehicles (PHV).

[0003] As secondary batteries such as lithium secondary batteries have become more widespread, there have been demands for higher performance. In general, positive electrode...

Claims

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